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Abstract:

We analyze the long distance behavior of the two-point functions for an interacting scalar O(N) model in de Sitter spacetime. Following our previous work, this behavior is analyzed by analytic continuation of the Euclidean correlators, which are computed by treating the homogeneous zero mode exactly and using a partial resummation of the interactions between the zero and the non-zero modes. We focus on massless fields and present an alternative derivation of our method, which involves a double expansion in 1/N and the coupling constant of the theory. This derivation is simpler than the previous one and can be directly extended for fields with negative squared-mass. We extend our previous results by computing the long wavelength limit of the two-point functions at next-to-leading order in 1/N and at leading order in the coupling constant, which involves a further resummation of Feynman diagrams (needed when the two-point functions are analitically continued). We prove that, after this extra resummation, the two-point functions vanish in the long distance limit. © 2018, The Author(s).

Registro:

Documento: Artículo
Título:Long distance behavior of O(N)-model correlators in de Sitter space and the resummation of secular terms
Autor:Nacir, D.L.; Mazzitelli, F.D.; Trombetta, L.G.
Filiación:Departamento de Física and IFIBA, FCEyN UBA, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón I, 1428, Buenos Aires, Argentina
Centro Atómico Bariloche, Instituto Balseiro and CONICET, Comisión Nacional de Energía Atómica, Av. Bustillo 9500, Bariloche, R8402AGP, Argentina
Scuola Normale Superiore, Piazza dei Cavalieri 7, Pisa, 56126, Italy
INFN — Sezione di Pisa, Pisa, 56200, Italy
Palabras clave:Cosmology of Theories beyond the SM; Nonperturbative Effects; Space-Time Symmetries
Año:2018
Volumen:2018
Número:10
DOI: http://dx.doi.org/10.1007/JHEP10(2018)016
Título revista:Journal of High Energy Physics
Título revista abreviado:J. High Energy Phys.
ISSN:11266708
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2018_n10_p_Nacir

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Citas:

---------- APA ----------
Nacir, D.L., Mazzitelli, F.D. & Trombetta, L.G. (2018) . Long distance behavior of O(N)-model correlators in de Sitter space and the resummation of secular terms. Journal of High Energy Physics, 2018(10).
http://dx.doi.org/10.1007/JHEP10(2018)016
---------- CHICAGO ----------
Nacir, D.L., Mazzitelli, F.D., Trombetta, L.G. "Long distance behavior of O(N)-model correlators in de Sitter space and the resummation of secular terms" . Journal of High Energy Physics 2018, no. 10 (2018).
http://dx.doi.org/10.1007/JHEP10(2018)016
---------- MLA ----------
Nacir, D.L., Mazzitelli, F.D., Trombetta, L.G. "Long distance behavior of O(N)-model correlators in de Sitter space and the resummation of secular terms" . Journal of High Energy Physics, vol. 2018, no. 10, 2018.
http://dx.doi.org/10.1007/JHEP10(2018)016
---------- VANCOUVER ----------
Nacir, D.L., Mazzitelli, F.D., Trombetta, L.G. Long distance behavior of O(N)-model correlators in de Sitter space and the resummation of secular terms. J. High Energy Phys. 2018;2018(10).
http://dx.doi.org/10.1007/JHEP10(2018)016